Ehmer says about 150 workers had been brought in as of Monday as part of the company's emergency response team. He says it's part of the company's culture to never close. The extra hands were partly needed because some local workers had to evacuate.

The chain is so well known for staying open no matter what that former Federal Emergency Management Agency administrator Craig Fugate created the so-called Waffle House Index. Fugate used the restaurants as a benchmark for how quickly local communities could rebound from hurricanes. Under the index, a closed Waffle House was a bad sign.

Ehmer says Waffle House is having to fly some food into Wilmington, which had been largely cut off from road access by Florence's floodwaters.